Google, Facebook and Amazon now collect more than half of all ad dollars spent in the U.S. The pandemic supercharged advertising’s "triopoly."

Google, Facebook and Amazon now collect more than half of all ad dollars spent in the U.S. The pandemic supercharged advertising’s "triopoly." https://t.co/JEiwbr9Y0W

— The Wall Street Journal (@WSJ) March 31, 2021